Dipper stick and dipper operating means



Sept. 21, 1954 n. F. PRZYBYLSKI DIPPER s'ncx m0 DIPPER OPERATING ums Filed on. 25. 19s:

2 Sheets-Sheet 1 m. u m w x MM ////f/ ///////v/ M F .L E. m p D Y. B 7 2 6 7 7) 5 m F ATTORNEY Sept. 21; 1954 o. F. PRZYBYLSKI DIPPER DIPPER OPERQTING MEANS F-ilgd Oct. 25, 1951 2 Sheets-Sheet 2 INVENTOR.

DANIEL F. PRZYBYLSKI ATTORNEY Patented Sept. 21, 1954 UNITED STATES PATENT OFFICE DIPPER STICK AND DIPPER OPERATING MEANS Claims.

1 My present invention relates to a novel grave digger and has for its object to provide a novel dipper stick and dipper-operating means.

To the above end, generally stated, the invention consists of the novel devices and combination of devices hereinafter described and defined in the claims. p

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a fragmentary view of the invention in side elevation;

Figs. 2 and 3 are fragmentary detail views partly in plan and partly in section taken on the line 22 and the irregular line 3-3 of Fig. 1, respectively;

Fig. 4 is a fragmentary detail view partly in side elevation and partly in section taken on the irregular line 4-4 of Fig. 3; I

Fig. 5 is a fragmentary detail view principally in plan with the dipper stick sectioned on the line 5-5 of Fig. 1;

Fig. 6 is a view principally in central vertical section taken on the line 6-6 of Fig. l

Fig. 7 is a view partly in plan and partly in section taken on the line 1-4 of Fig. 6;

Fig. 8 is a fragmentary view partly in side elevation and partly in section taken on the irregular line 88 of Fig. 6;

Fig. 9 is a fragmentary sectional view taken on the line 9-9 of Fig. 7; and

Fig. 10 is a front elevational view of the elevator and a section of the dipper stick on which it is mounted.

The numeral I I indicates a dipper of the clamshell type attached to the lower end portion of an upstanding dipper stick I2. The two jaws [3 of the dipper ll comprise front and rear members l4 and two side members IS. The front and rear jaw members I 4, when closed, are substantially semi-circular in cross-section and the side members l5are parallel and extend materially above said front and rear jaw members [4. A pair of overlapping hinge lugs I6 connect the two sections of each side member l5 and have aligned transverse holes. These hinge lugs 16 are fixed to the upper portions of the sections of the side members IS on the inside thereof and project thereabove.

The dipper stick I 2 comprises a cylindrical upper section I1 and a lower section formed of two channel bars l8 integral with said upper section. The channel bars I8, from the cylindrical section, first extend in downwardly diverging relation, and then they extend parallel for the major portion of their length, with their flanges in opposing relation. The channel bars |B, at the upper end portions of their parallel sections, are rigidly connected by a pair of crosstie bars [9 secured to the outer sides thereof. The channel bars I8 are further rigidly connected, at their lower end portions, by a large tubular member 20, the ends of which abut the webs of said channel bars [8 at their transverse centers and are rigidly secured thereto.

A pair of tubular members 2|, axially aligned with the tubular member 20, is rigidly secured, at their inner ends, to the webs of the channel bars l8. Two trunnions 22 extend, one into each of the tubular members 20, and are secured thereto by bolts 23. The trunnions 22 extend through the aligned holes in the pairs of hinge lugs l6 and pivotally support the same and the dipper l I.

An elevator 24, in the form of a rectangular sleeve, extend around the two channel bars l8 with a free sliding fit thereon. The elevator 24, at each end, is connected by a pair of links 25 to the dipper jaws l3. A ribbed bracket 26, integral with each end ofthe elevator 24, extends outwardly therefrom and has on its outer end a depending ear 27. Each pair of links 25 is pivotally attached to. the elevator 24 by a pin 28 mounted in the ear 2'! of said bracket and a boss 29 on said elevator. The links 25 of each pair are in downwardly diverging relation from their pivot pin 28. The links 25 of each pair are at their lower end attached by pivot pins 30 to and between pairs of laterally spaced ears 3! integral with the upper flanges of a pair of angle bars 32. These angle bars 32 extend, one in each of the jaws I3 from one end to the other thereof along the upper longitudinal edgeportions of the front and rear members [4. The flanges of the angle bars 32, at their longitudinal edges, rest on the dipper jaw members [4 and are fixed thereto.

The elevator 24 is raised and lowered to open and close the dipper jaws l3 through the links 25, by a hydraulic ram 33 that extends centrally in the cylindrical section ll of the dipper stick [2 and between the channel bars l8. This ram 33 includes a cylinder 34 pivoted at its upper end on a pin 35 that extends transversely through a pair of aligned holes in the cylindrical section I! and secured to said section. Cooperating with the cylinder 34 is a piston 36 having a depending piston rod 31. This piston rod 3! has a short reduced lower end portion 38 that extends into an upstanding tubular boss 39 and secured thereto by a pin 49. The tubular boss 39 is an integral part of a plate 4| that extends transversely between the channel bars I8, rests at its end portions on the upper edges of side members of the elevator 24 and secured thereto. The plate 4| has on its under side a central longitudinal reinforcing rib 42, the ends of which abut the sides of the elevator 24 and are secured thereto. On each end portion of the cylinder 34 is a fitting 43 through which fluid under pressure is introduced into said cylinder for operating the piston 36.

The cylindrical section I! of the dipper stick i2 is turnably mounted in a two-part ribbed sleeve bearing 44 having outturned cars 45 connected by nut-equipped bolts 46. One part of the bearing 44 has a pair of integral outstanding laterally spaced ears 4?. The cylindrical section ll of the dipper stick I2 is held against axial movement in the bearing 44 by and between a pair of annular ribs 48 integral with said section H. The dipper stick i2 is raised and lowered in part by a hydraulic ram 45 comprising a cylinder 59 and a cooperating piston having a piston rod 52. The cylinder 50, at its outer end, is pivoted to and between a pair of upstanding links 53 fragmentarily shown. The piston rod 52, at its outer end, extends between the ears 41 and is attached thereto by a pivot pin 54. On each end portion of the cylinder 50 is a fitting 55 through which fluid under pressure is introduced in the cylinder 55 for operating the piston 5|.

The dipper stick i2 is operated to position the dipper H by a boom 56 and swung laterally by a boom 5?, both being fragmentarily shown. The ram 59, links 53 and booms 56 and 51, in conjunction With the present invention, form a part of a grave digger. The elements 49, 53, 56 and 5'! are fully shown, described and broadly claimed in an application for patent executed of even date herewith. The two booms 55 and 51 are spaced parallel, the former above the latter, in the same plane. These booms 56 and 51, at their outer end portions, extend between a pair of laterally spaced bearing plates 58 and are connected thereto, each by a pivot pin 59. The bearing plates 55 are integral with a hub 60 positioned midway between the pivot pins 59 and inwardly thereof. A mount (ii, for the bearing plates 58, includes a pair of side plates 62 connected by a nutequipped pivot bolt 63 on which the hub as is turnably mounted. The side plates 52 are integral with two two-part sleeve bearings 64 and 55 spaced, the former above the latter, and in which bearings the cylindrical section I! of the dipper stick i2 is turnably mounted. These bearings 5d65 have outturned ears 65 connected by nut-equipped bolts 61. The bearings 64-455 are held against axial movement on the cylindrical section ll of the dipper stick 12 by and between a pair of annular ribs 68 integral with said section Ill.

The dipper stick 12 may be turned ninety degrees (90) in the bearings 44, 64 and 85 by a hydraulic ram 55 and a pair of laterally spaced crank-acting arms 10, integral with the cylindrical section ii of the dipper stick [2, midway between the bearings 6 and 65. This turning of the dipper stick i2 positions the dipper II to form a square while digging. The ram 69 includes a cylinder H and a cooperating piston 12 having a piston rod 13. The cylinder H has on its outer end a lug 14 that extends between a pair of laterally spaced ears and is connected thereto by a pivot pin 16. Said cars 15 are fixed to the outer end portion of a horizontal bar 'l'i rigidly secured, at its inner end portion, to one of the side plates 62, see Figs. 1 and 5. The piston rod '53, at its outer end portion, extends between the crank arms l0 and is connected thereto by a pivot pin it. Fluid under pressure is introduced into each end portion of the cylinder H through a fitting is for operating the piston 12.

The ram 59, for turning the dipper stick l2, also forms a part of the dipper stick-operating means heretofore referred to.

Associated with the dipper II, for guiding the same, when digging a grave or other excavation, is an outrigger 59. This outrigger 89 has a rectangular frame 5! including a pair of flat side bars 82 positioned edgewise in vertical planes. A shoe 83, in the form of an upright plate, flat in cross-section, is fixed at its upper end near its transverse center to each end of each side bar 82 and depends therefrom. The end portions of the shoes 83 are curved inwardly. The outrigger frame 8! further includes end bars 54, ositioned edgewise in the planes of the shoes 53 and integral with the inner edges of said shoes slightly below their vertical centers. Reinforcing gussets 85, in the lanes or the side bars 82, rigidly connect the shoes 53 to said side bars.

The channel bars 18 of the dipper stick l2 extend through the outrigger frame Si-8 l at its longitudinal and transverse centers and is rigidly secured thereto by a pair of depending flat plates 55 and a pair of gussets 5?. The plates 86,

at their upper ends, are integral with the side bars 52, at their lower edges and longitudinal centers. These plates 85 are in downwardly converging relation and are rigidly secured to the channel bars it, by the gussets 51. Said gussets 87 are formed or fiat plates and disposed in vertical planes. The gussets Bl are rigidly secured at their upright edges to the inner faces of the plates 56 and the outer faces of the channel bars !-8 at their transverse centers.

Obviously, the shoes 83 engage opposite sides of a grave as, as shown in Fig. 1, and thus guide the dipper ll.

From what has been said, it will be understood that the invention described is cap-able of modifications as to details of construction and ar rangement within the scope of the invention herein disclosed and claimed.

Copending with this application are two applications identified as follows:

Grave Digger, filed October 25, 1951, under Serial No. 253,181, with claims to a bed, a frame tiltable on the bed, a turntable fixed to the frame, rams for tilting the frame and the turntable, a second frame turnable on the turntable and rams for turning the second frame; and

Boom and Boom-Operating Means for Dipper Stick, filed October 25, 1951, under Serial No.

253,183, with claims to a frame, a travelling dolly on the frame, a boom ivoted to the dolly, means for raising and lowering the boom, and means for endwise reciprocating the boom during the raising and lowering of the same.

What I claim is:

1. An upstanding dipper stick having a cylin drical upper section and a lower section formed of two channel bars in rectangular arrangement and with their flanges in opposing relation, bearings in which the cylindrical section of the dipper stick is turnably mounted, means on said dipper stick for holding the same from axial movement in the bearings, crosstie members connecting the channel bars, adipper including a pair of jaws hinged to the lower end portions of the channel bars, an elevator in the form of a rectangular member slidable on the channel barsand held from relative turning, means connecting the elevator to the jaws for opening and closing the same, and a hydraulic ram for operating the elevator, said ram comprising a cylinder and a cooperating piston having a piston rod, said cylinder extending axially in the cylindricalsection and attached thereto at its outer end, said piston rod extending between the channel bars and attached to the elevator, said cylinder having at each end portion a fitting through which fluid is introduced into the cylinder for operating the piston.

2. The structure defined in claim I in which the piston rod has a reduced outer end portion, said structure further includes a plate extending transversely between the channel bars and rigidly secured at its ends to the side members of the elevator, said plate having at its center a tubular boss into which the reduced end portion of the piston rod extends and is attached thereto.

3. An upstanding dipper stick, a dipper including a pair of jaws hinged to the lower end portion of the dipper stick, an elevator slidable on the dipper stick above the dipper, connections from the elevator to the jaws for opening and closing the same, means for raising and lowering the elevator relative to the dipper stick, and an outrigger including a frame secured to the elevator above the dipper and having wall-engaging shoes for guiding the dipper, each shoe being a vertically elongated rectangular plate, the lower end portion of which is inwardly curved.

4. An upstanding dipper stick, a dipper including a pair of jaws hinged to the lower end portion of the dipper stick, an elevator slidable on the dipper stick above the dipper, connections from the elevator to the jaws for opening and closing the same, means for raising and lowering the elevator relative to the dipper stick, and an outrigger including a rectangular frame secured at its center to the elevator above the dipper and having at each corner an independent wall-engaging shoe for guiding the dipper.

5. An upstanding dipper stick, a dipper includ ing a pair of jaws hinged to the lower end portion of the dipper stick, an elevator slidable on the dipper stick above the dipper, connections from the elevator to the the jaws for opening and closing the same, means for raising and lowering the elevator relative to the dipper stick, and an outrigger including a frame comprising side and end members secured to the elevator above the dipper and having wall-engaging shoes for guiding the dipper, said shoes being vertically elongated rectangular plates integral with the end members, depending therefrom and their lower end portions being inwardly curved, and in which the side members rigidly connect the shoes at their intermediate portions.

References Cited in the file of this patent UNITED STATES PA'IENTS Number Name Date 850,356 Desy Apr. 16, 1907 1,481,336 Armstrong Jan. 22, 1924 2,197,989 Tyler Apr. 23, 1940 2,223,645 Solomon Dec. 3, 1940 2,465,629 Brosius Mar. 29, 1949 2,486,479 Kennedy Nov. 1, 1949 2,594,720 Beck Apr. 29, 1952 FOREIGN PATENTS Number Country Date 644,232 Germany Apr. 27, 1937 

